2021 Heartland Mallard, The 2021 Heartland Mallard M335 is a fabulous couples rear living model with a kitchen island, seating directly across from the TV and great awning space. If you're looking to enjoy the outdoors in a safe and exciting way, then you'll be happy to know that you'll find no shortage of entertainment here, in the safest way to see the United States. Hit the open road and plan your next RV vacation today!